Human growth hormone was originally prepared from cadaveric pituitary glands. This material was used from the late 1950s until the mid-1980s when it was suddenly withdrawn from the market until...

Human growth hormone was originally prepared from cadaveric pituitary glands. This material was used from the late 1950s until the mid-1980s when it was suddenly withdrawn from the market until recombinant growth hormone became available in 2005. What prompted the withdrawal? What are the risks of using human material in therapeutic agents?